Spindle fibers
A collection of microtubules attached to a centromere during mitosis and meiosis that are responsible for the movement of the chromosomes to opposite poles.
spindle fibers - protein structures which move the chromosomes during cell division.
telophase - mitotic stage where nuclear membrane reforms and the spindle fibers disappear.
Spindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase plate.
Spindle fibers have three destinations:
Some attach to one kinetochore of a dyad with those growing from the opposite centrosome binding to the other kinetochore of that dyad.
Some bind to the arms of the chromosomes.
spindle fibers The protein fibers formed during prophase of nuclear division; chromosomes attach to these fibers at the centromere.
The spindle fibers attach to the chromosomes and begin to move them to the center of the cell as they do in mitosis.
Metaphase I
Bivalents (tetrads) become aligned in the center of the cell and are attached to spindle fibers.
Anaphase: Spindle fibers shorten, the kinetochores separate, and the chromatids (daughter chromosomes) are pulled apart and begin moving to the cell poles.
The central portion of the chromosome to which the spindle fibers attach during mitotic and meiotic division. Chemotherapy. A treatment for cancers that involves ad- ministering chemicals toxic to malignant cells. Chloramphenicol.
Centromere A specialised chromosome region to which spindle fibers attach during cell division.
Chromatid The two identical halves of a chromosome produced for cell division and meiosis.
The term introduced by Darlington (1936) for the specialized chromosome region which reacts to the spindle at nuclear division and to which spindle fibers attach during cell division. Appears as a distinct "waist" by microscopy.
During metaphase, centromeres of the chromosomes will be aligned in the centre of the nucleus and spindle fibers will be attached to them.
Some of the spindle fibers reach the chromosomes and attach to protein structures at the centromeres, called kinetochores, while others make contact with microtubules coming from the opposite pole.
In fluorescence images of mitosis, the two poles of the spindle and the spindle fibers are clearly visible, as are the asters, which radially migrate away from the metaphase plate.
The string is the cell membrane, the pipe cleaners are the chromatids and the chalk is used to draw the spindle fibers and nuclear membrane, and the pinwheel macaroni is used to demonstrate centrioles(many different things can be used for this).
The centromere is a region of a eukaryotic chromosome where the kinetochore is assembled. Thus, it is the site where spindle fibers of the mitotic spindle attach to the chromosome during mitosis.
Metaphase I is when tetrads line-up along the equator of the spindle. Spindle fibers attach to the centromere region of each homologous chromosome pair. Other metaphase events as in mitosis.
During mitosis, chromosome separation requires spindle fibers made of microtubules; spindle inhibitors stop the synthesis of microtubules. Because most adult cells don't divide often, they are less sensitive to these drugs than are cancer cells.
A specialized chromosome region to which spindle fibers attach during cell division.
Chimera (pl. chimaera) ...
Hollow cylinders made of the protein tubulin that form, among other things, the spindle fibers.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
the structure located at a specific site on the chromosome that holds the two chromatids together; it is the site of attachment for the spindle fibers during cell division; also called primary constriction or kinetochore ...
Cells that contain centrioles also have a series of smaller microtubules, the aster, that extend from the centrioles to the cell membrane. The aster is thought to serve as a brace for the functioning of the spindle fibers.
Prophase - phase of mitosis in which the chromatin duplicates itself and thickens into chromosomes, the spindle fibers form, and the nuclear membrane disintegrates ...
 See also: Spindle, Chromosome, Cell, Chromosomes, Cells
  
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